gerc¶
Computes a rank-1 update (conjugated) of a general complex matrix.
Description¶
The gerc
routines compute a scalar-vector-vector product and add the
result to a general matrix. The operation is defined as
where:
alpha
is a scalar,A
is anm
-by-n
matrix,x
is a vector of lengthm
,y
is vector of lengthn
.
API¶
Syntax¶
void gerc(queue &exec_queue,
std::int64_t m,
std::int64_t n,
T alpha,
buffer<T,1> &x,
std::int64_t incx,
buffer<T,1> &y,
std::int64_t incy,
buffer<T,1> &a, std::int64_t lda)
gerc
supports the following precisions and devices.
T |
Devices Supported |
---|---|
|
Host, CPU, and GPU |
|
Host, CPU, and GPU |
Input Parameters¶
- exec_queue
The queue where the routine should be executed.
- m
Number of rows of
A
. Must be at least zero.- n
Number of columns of
A
. Must be at least zero.- alpha
Scaling factor for the matrix-vector product.
- x
Buffer holding input vector
x
. The buffer must be of size at least (1 + (m
- 1)*abs(incx
)). See Matrix Storage for more details.- incx
Stride of vector
x
.- y
Buffer holding input/output vector
y
. The buffer must be of size at least (1 + (n
- 1)*abs(incy
)). See Matrix Storage for more details.- incy
Stride of vector
y
.- a
The array holding input matrix
A
must have size at leastlda
*n
if column major layout is used, or at leastlda
*m
if row major layout is used.- lda
Leading dimension of matrix
A
. It must be positive and at least m if column major layout is used or at least n if row major layout is used.
Output Parameters¶
- a
Buffer holding the updated matrix A.